Details:

Creators:
Nguyen, Vinh ; Meuli, Josh ; Brooks, Bill ; Jansen, Henri ; Westall, John ; ... More +
Nguyen, Vinh ; Meuli, Josh ; Brooks, Bill ; Jansen, Henri ; Westall, John ; Koretsky, Milo Less -
Corporate Creators:
Oregon State University
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Anodes--Corrosion--Prevention Reinforced Concrete--Cathodic Protection Zinc Coating--Testing Anodes Reinforced Concrete Resistance Tests Ultrasonic Tests Zinc
Publication/ Report Number:
FHWA-OR-RD-10-11
Resource Type:
Tech Report
Geographical Coverage:
Oregon
OCLC Number:
748288772
Edition:
Final report.
Corporate Publisher:
Oregon. Dept. of Transportation. Research Section
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
Abstract:
Thermal sprayed zinc anodes used for impressed current cathodic protection of reinforced concrete deteriorate over time.

Two different technologies, ultrasound and electrical circuit resistance combined with water permeability, were

investigated in the laboratory to determine whether they were feasible methods for estimating anode condition. The

ultrasonic method was unable to detect a reflected acoustic signal from zinc-on-concrete specimens due to scattering of the

signal within the samples. Circuit resistance was shown to increase with the electrochemical age of the specimens, but the

resistance trend did not correlate with the bond strength trend at later ages. The aged specimens were fairly impermeable

to water infiltration presumably due to build up of reaction products in the porosity. Consequently, a method of using

resistance measurements combined with water infiltration to determine anode condition was not successful. It was shown

that the permeability improved if the surface was mechanically perturbed such as creating a pin hole. Improving

permeability by penetrating the surface could have ramifications for improving anode performance.


Format:
PDF
Funding:
SPR 653
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:190a9073a068d7f8c985a3e659145616722861afd94d17e18036328987c9f55e
Download URL:
https://rosap.ntl.bts.gov/view/dot/21778/dot_21778_DS1.pdf
File Type:

Supporting Files

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